Sync Check Relay Function

Be1 25 sync check function measures the phase angle between single phase voltages of line and bus.

Sync check relay function. Then sync check verifies that this angle is less than the front panel phase angle selector setting. Sync check relay synchronism check relay are relays that allow unattended synchronization of a machine with a system. If the measured angle has met this criteria for the time period defined by the front panel time delay setting the sync output contact closes. Sync check relay the be1 25 sync check relay monitors the voltages on both sides of a circuit breaker and determines that proper phase angle and voltage exist prior to closing the circuit breaker.

It provides voltage protection functions including over undervoltage loss of phase over underfrequency monitoring and sync check. The voltage check function is used when a disconnected bus line is to be connected to an. The synchro check relay spau 140 c can be used for both synchro check functions and voltage check functions. The vr 300 is a fixed mounted industrial grade protective relay that offers multiple protective features in a single package.

The volt free relay contacts change state when the voltage level phase relationship and frequency are within the selected synchronising limits. Generator sync check relays should supervise both manual and automatic modes of operation to prevent generator damage from operator errors or from malfunctioning automatic synchronizing relays. The synchro check function is used when two separate networks or two electrically interconnected network sections are to be connected together. The relay will drop out or stay in according to the function set ting on the sypd as described above.

In the design of electrical power systems the ansi standard device numbers ansi ieee standard c37 2 standard for electrical power system device function numbers acronyms and contact designations identifies the features of a protective device such as a relay or circuit breaker these types of devices protect electrical systems and components from damage when an unwanted event occurs such. Features phase angle limit is adjustable over the range of 1 to 99 degrees. Features multi function check relay extremely compact rail mounting for easy cabling on the baseplate three wire interface to an optional panel indicator microcontroller and smd technic for accurate and reliable function. Connecting two electrical systems that are not closely matched can cause expensive damage and disturbance to the electrical.

Today these are digital microprocess. The synchro check relay spau 140 c can be used for both synchro check functions and voltage check functions. For this reason it is normal practice to have the sync check relay function provided in a different package than the automatic synchronizing relay to.